Grafana 6.1.0-beta1 - 7.4.3 Access Control Bypass Vulnerability

# Copyright (C) 2021 Greenbone Networks GmbH
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-or-later
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

CPE = "cpe:/a:grafana:grafana";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.145676");
  script_version("2021-08-17T14:01:00+0000");
  script_tag(name:"last_modification", value:"2021-08-17 14:01:00 +0000 (Tue, 17 Aug 2021)");
  script_tag(name:"creation_date", value:"2021-03-29 09:21:42 +0000 (Mon, 29 Mar 2021)");
  script_tag(name:"cvss_base", value:"3.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:S/C:N/I:P/A:N");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2021-04-30 08:15:00 +0000 (Fri, 30 Apr 2021)");

  script_cve_id("CVE-2021-28147");

  script_tag(name:"qod_type", value:"remote_banner");

  script_tag(name:"solution_type", value:"VendorFix");

  script_name("Grafana 6.1.0-beta1 - 7.4.3 Access Control Bypass Vulnerability");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2021 Greenbone Networks GmbH");
  script_family("General");
  script_dependencies("gb_grafana_http_detect.nasl");
  script_mandatory_keys("grafana/detected");

  script_tag(name:"summary", value:"Grafana is prone to an access control bypass vulnerability.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");

  script_tag(name:"insight", value:"The team sync HTTP API in Grafana Enterprise has an incorrect access
  control issue. On Grafana instances using an external authentication service and having the EditorsCanAdmin
  feature enabled, this vulnerability allows any authenticated user to add external groups to any existing
  team. This can be used to grant a user team permissions that the user isn't supposed to have.");

  script_tag(name:"affected", value:"Grafana version 6.1.0-beta1 through 7.4.4.");

  script_tag(name:"solution", value:"Update to version 6.7.6, 7.3.10, 7.4.5 or later.");

  script_xref(name:"URL", value:"https://community.grafana.com/t/grafana-enterprise-6-7-6-7-3-10-and-7-4-5-security-update/44724");

  exit(0);
}

include("host_details.inc");
include("version_func.inc");

if (!port = get_app_port(cpe: CPE))
  exit(0);

if (!infos = get_app_version_and_location(cpe: CPE, port: port, exit_no_version: TRUE))
  exit(0);

version = infos["version"];
location = infos["location"];

if (version_in_range(version: version, test_version: "6.1.0", test_version2: "6.7.5")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "6.7.6", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range(version: version, test_version: "7.0.0", test_version2: "7.3.9")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "7.3.10", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range(version: version, test_version: "7.4.0", test_version2: "7.4.4")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "7.4.5", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);